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09.26.2017 Market Oversight Division, Arizona Department of Insurance 3
ADOI and its actuaries carefully analyze an insurer’s justification (explanation) for a rate increase of 10%
or more—called a “threshold rate increase.” With the help of actuaries, the ADOI decides if a threshold
increase is “reasonable” or “unreasonable.”
What happens if ADOI finds a rate increase “unreasonable?”
If ADOI determines that a threshold increase of 10% or more is “unreasonable,” ADOI advises the
insurance company of the unreasonable determination. ADOI gives the insurer a chance to file a smaller
rate increase. The insurance company may decline and choose to calculate premium for its customers
based on the higher “unreasonable” rate increase. However, the insurance company then must
publically disclose on its website that ADOI determined the increase to be “unreasonable,” and must
provide a justification for using the “unreasonable” rate increase. Customers can view insurer
explanations for significant rate increases at https://ratereview.healthcare.gov/.
Why does my premium go up each year?
As noted above, your insurance company creates charts of rates (and calculates your premium) based
on how much it cost the company last year to pay medical claims for all of its customers, and how much
it estimates the cost will be next year. To raise rates and your premium, the insurance company must
file an explanation with ADOI showing why it will cost more next year to pay its customers’ medical
claims. The cost of medical care has gone up each year. New tests, medical procedures, and drugs
become available each year. Therefore, it usually costs an insurer more each year to pay the claims for
its customers. As a result, the company charges each customer more so it can pay those claims.
Your premium will also increase as you age. Insurers will charge the same amount per child for each
child age 14 and under, but beginning at age 15 the monthly premium cost will go up gradually every
year until age 64. (Before January 1, 2018, this gradual increase began at age 21.)
Why was my premium increase greater than the percentage listed on
the Department’s website?
Each year, the ADOI publishes insurers’ overall rate changes on its website. This rate change is expressed
as a percent increase or decrease relative to the prior rate. This is the average rate change for all
Individual or Small Group plans offered by the insurer. However, the premium change for your particular
plan may be greater or less than the overall average change. Your premium may also go up because you
and your covered dependents are a year older, or if you have moved to a new county.
Why did the premium charged for my child/children increase so much
in 2018?
The way that insurers calculate premium for individuals under age 21 will change effective January 1,
2018 due to a change in federal regulation. First, the amount that an insurer may charge for individuals
under age 21 increased. Second, insurers must now charge the same rate for each individual age 14 and
under and begin gradually increasing rates for individuals at age 15. (Previously insurers charged the
same rate for each individual aged 20 and under and began gradually increasing rates at age 21.)
As a result, the rate for individuals aged 14 and under may increase by 20%, and the rate for individuals
aged 15 to 20 may increase 30% or more.